Ignztek and control device fos



Sept. 12, 1933; w. s. VALMORE 1,926,218

IGNITER AND CONTROL DEVICE FOR OVENS v Filed April 8; 1930 sShee'lis-Sheet 1 Sept 12, 1933. w. s. VALMORE 1,926,218

IGNI'I'ER AND CONTROL DEVICE FOR OVENS Filed April 8, 1950 3Sheets-Sheet 3 Patented Sept. 12, 1933 UNITED IGNHTEIR AND @ON'EROLDEVIIDE 170E, @VENS This invention relates to an automatic igniter andcontrol device for use with gas fired ovens and is of generalapplication. although the embodiment of the invention herein disclosedis particularly adapted for use in connection with the oven of a gasrange.

One of the objects of the invention is to provide an automatic igniterand safety control device whereby the oven may be automatically m turnedon and off in accordance with predetermined conditions.

- A further object of the invention is to provide a safety controldevice of the character described which is dependable and efficient inoperation and which comprises comparatively few parts which can bereadily assembled and disassem bled.

Another object of the invention is to provide a safety control device ofthe character described which is adapted for use in connection with atime clock whereby the clock may be set to turn on the oven burner andignite the same and after the burner has been in operation for apredetermined period of time, to cut off the supply of 5 gas and toextinguish the burner.

Further and more limited objects of the invention will appear as thedescription proceeds and by reference to the accompanying drawings inwhich Fig. 1 is a fragmentary top plan view with certain parts brokenaway to more clearly illustrate the details of construction anddisclosing my safety control device attached to a gas range; Fig. 2 is afragmentary view partly in plan and partly in horizontal sectionillustrating certain details of construction andthe manner of securingand arranging the various parts in place; Fig. 3 is a detail view partlyin elevation and partly in section illustrating several conduits forcontrolling the supply of fuel to the several burners; Fig. 4 is afragmentary view partly in side elevation and partly in sectionillustrating the thermostat control burner and the valve for controllingthe flow of fuel thereto; and Fig. 5 is a fragmentary view partly invertical section and partly in side elevation illustrating the conduitfor delivering fuel to the pilot burner.

Referring now to the drawings the reference character 1 designates a gasrange of any conventional form having an oven 2 in which is arranged anoven burner 3 having a supply conduit 4 leading outwardly through theside wall of the oven and provided with a suitable air mixer 5. Therange is also provided with the usual cooking top 6 having top burners 7and 8 thereon. Disposed along the front of the stove is a gas supplypipe or conduit 9 from which lead branches 10 and 11 supplying fuel tothe burners 7 and 8. The supply of gas to the burners 7 and 8 iscontrolled by manually operable valves 12 and 13 in a manner well knownto those skilled so in the art.

Leading from the fuel supply pipe 9 is a conduit 14 in which is arrangeda valve 15 controlled by a handle 16. The conduit 14 is threadedlysecured to a branch connection or union 1'? to which is secured a tubeor nipple 18 which is adapted to deliver fuel into the oven burnersupply conduit 4. Leading from the connection 17 is a tube or conduit 19the opposite end of which is connected with a casing 20 in which isarranged a thermostat 21 one end of which is rigidly secured to thecasing and the other end of which is connected with a rod 22 which isdisposed within the conduit 19. Secured to the opposite end of the rod22 is a valve member 23 adapted to engage a valve seat 24. 'Carried bythe tube or conduit 19 and adjustably positioned thereon is acombination safety and pilot light burner 25 which is adjustably securedin place by means of a screw 26, as shown most clearlv in Fig. 2.

The safety and control burner really consists of two separate burnerswhich are cast in one piece so as to facilitate production and reducethe cost of manufacture. This burner has a flame port 2'7 and a flameport 28. A tube or conduit 29 leads from the supply pipe 9 and connectswith the burner 25 so that the flame port 28 is always in constant opencommunication with the supply of fuel and is adapted to burncontinuously. Leading from the connection 17 is a tube or conduit 30which leads from a point between the valve 23and the source of supply offuel. The opposite end of the tube 30 connects with the burner 25 anddelivers fuel to the flame port 2'7 in a manner to be hereinafterdescribed. The flame port 2'7 is disposed at such an angle with respectto the casing 20 that the flame will impinge against the casing 20 andthus heat the thermostat 21. posed closely adjacent the flame port 28 sothat the gas escaping from port 28 will be ignited therefrom. Arrangedwithin the conduit 30. is a valve 31 having a valve operating lever. 32

which is adapted to be connected with a lever 33 forming part of a clockmechanism 34. The details of construction of the time clock forms nopart of this invention and are therefore not'di'sclosed as such devicesmay be purchased in the open market. This clock is so arranged that itvThe flame port 27 isalso dis- 100 will actuate the lever 33 to open thevalve 31 for a predetermined period of time and then close the valve.Leading from the conduit 31 at a point in advance of the flame port 27is an igniter in the form of a perforated tube 35 the supply of gas towhich is regulated by means of a regulating valve 36. The flow of fuelto the port 27 is regulated by means of a regulating valve 37. The tube35 leads through'an opening provided in the side wall of the oven.

In Figs. 1 and 2 the parts are shown in the normal position with thevalves 15 and 23 closed. Gas will be supplied to the burner port 28through the supply pipe 9 and the conduit 29 and the gas issuing throughthis port will be ignited. In fact the burner 28 constitutes a pilotlight which is normally burning. Should the housewife desire to leavethe premises and set the range so that the oven burner will beautomatically turned on and ignite at say 3 oclock and burn until 4o'clock and then turn off, the valve 15 will be turned on or opened soas to permit gas to flow therethrough. The time clock 34 will be set sothat the lever 33 will be actuated at 3 oclock to open the valve 31whereupon gas will be delivered to the burner 25 and the flame port 27and will become ignited from the pilot flame issuing from the port 28.After this burner has been burning for a slight period, the thermostat20 will become heated and tend to uncoil or expand and move the valve 23from its seat thus permitting gas to flow through the connection 17 andtube 18 to the conduit 4 and the oven burner 3. Gas will also flow fromthe conduit 30 through the tube 35 and become ignited from the flameissuing from the port 27. It will therefore be seen that as soon as gasis supplied to the burner 3 it will become ignited from the flame jetsissuing from the ports in the tube jet 35; The burner will continue inoperation until the clock actuates the lever 33 to close the valve 31thus cutting off the supply of gas through the conduit 30 whereupon theflame issuing from the port 27 will become extinguished. The thermostatwill thus be no longer heated and will cool and contract and close thevalve 23 thus cutting oil the supply of gas to the oven burner 3. Itwill also be seen that my improved control device serves also as asafety device for cutting off the supply of fuel to the burner shouldthe thermostat control burner for any reason become extinguished. Inorder for the oven burner to remain in operation, it is'necessary thatthe burner 27 be also in operation. Should it be Bil desired to use thedevice without the time clock, the valve 31 may be manually opened anddisconnected from the time clock whereupon the stove may be operated inthe usual manner.

Various changes may be made in the details of construction as well as inthe shape or size and manner of securing and arranging the various partsin place without departing from the spirit of my invention. Theembodiment of the invention herein disclosed is therefore merelyillustrative and is not to be considered in a limiting sense and isintended to be limited only in accordance with the scope of the appendedclaims.

Having thus described my invention, what I claim is:

1. In a control device of the character described, the combination of anoven and a burner therefor, a fuel supply pipe for said oven burner, avalve in said supply pipe, a thermostat located outside of the oven andoperatively connected with said valve, a constantly burning pilotburner, an auxiliary burner disposed outside of the oven and adjacentsaid thermostat so as to heat the same to open said valve and positionedto be lighted from said pilot burner, said thermostat being responsiveonly to the heat of said auxiliary burner, an igniter positioned so asto be ignited from said auxiliary burner and operable to ignite saidoven burner, and means for supplying fuel to said auxiliary burner andigniter.

2. In a control device of the character described, the combination of anoven and a burner therefor, a fuel supply pipe for said oven burner, avalve in said supply pipe, a thermostat operatively connected with saidvalve, a constantly burning pilot burner, an auxiliary bumer disposedadjacent said thermostat so as to heat the same to open said valve andpositioned so as to be lighted from said pilot burner, said thermostatbeing responsive only to the heat of said auxiliary burner, an igniterpositioned to be ignited from said auxiliary burner and operable toignite said oven burner, and means for supplying fuel to said auxiliaryburner and igniter, said pilot burner and auxiliary burner beingpositioned outside of the oven and said igniter extending into the oven.

3. In a control device of the character described, the combination of anoven and a bumer therefor, a fuel supply pipe for said oven burner, avalve in said supply pipe, a thermostat operatively connected with saidvalve, a constantly burning pilot burner, an auxiliary burner disposedoutside of the oven and adjacent said thermostat so as to heat the sameto open said valve and positioned so as to be lighted from said pilotburner, said thermostat being disposed outside of the oven andresponsive only to the heat of said auxiliary burner, an igniterpositioned so as to'be ignited from said auxiliary burner and operableto ignite said oven burner, means for supplying fuel to said auxiliarybumer and igniter, and clock controlled means for controlling the flowof fuel to said auxiliary bumer andigniter.

WM. s. VALMORE.

